Pharynx

related topics
{disease, patient, cell}
{line, north, south}
{@card@, make, design}
{specie, animal, plant}
{area, part, region}
{language, word, form}

The human pharynx (plural: pharynges) is the part of the throat situated immediately posterior to (behind) the mouth and nasal cavity, and cranial, or superior, to the esophagus, larynx, and trachea. The human pharynx is conventionally divided into three distinct anatomic sections: the nasopharynx, the oropharynx, and the hypopharynx. The pharynx is part of the digestive system and also the respiratory system; it is also important in vocalization.

Contents

Nasopharynx

The nasopharynx is the most important part in digestive and the respiratory system.The nasopharynx is the most cephalad portion of the pharynx. It extends from the base of the skull to the upper surface of the soft palate.[1] It includes the space between the internal nares and the soft palate and lies superior to the oral cavity. The pharyngeal tonsils, more commonly referred to as the adenoids, are lymphoid tissue structures located in the posterior wall of the nasopharynx.

Polyps or mucus can obstruct the nasopharynx, as can congestion due to an upper respiratory infection. The Eustachian tubes, which connect the middle ear to the pharynx, open into the nasopharynx. The opening and closing of the Eustachian tubes serves to equalize the barometric pressure in the middle ear with that of the ambient atmosphere.

The anterior aspect of the nasopharynx communicates through the choanae with the nasal cavities. On its lateral walls are the pharyngeal ostia of the auditory tube, somewhat triangular in shape, and bounded behind by a firm prominence, the torus tubarius or cushion, caused by the medial end of the cartilage of the tube which elevates the mucous membrane. Two folds arise from the cartilaginous opening:

Full article ▸

related documents
Grey matter
Pathogen
Non-Hodgkin lymphoma
Meconium
Cowpox
Proteinuria
Ampicillin
Blood vessel
Hematology
Epidemic
Fatal familial insomnia
Prune belly syndrome
Ileum
Streptococcus
Trimethoprim
Angiopathy
Apraxia
Adrenocorticotropic hormone
Anorexia (symptom)
Adrenal gland
Vaccine
Zoonosis
Perineum
Dilation and curettage
Allergen
Psychiatrist
Nicotinamide
Lumbar disc disease
Hemoglobinopathy
Ligament